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<a name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2006-2008 Michele Mostarda ( michele.mostarda@gmail.com ).</em>
<a name="3" href="#3">3</a>   <em class="jxr_comment"> * All Rights Reserved.</em>
<a name="4" href="#4">4</a>   <em class="jxr_comment"> *</em>
<a name="5" href="#5">5</a>   <em class="jxr_comment"> * Licensed under the Apache License, Version 2.0 (the 'License');</em>
<a name="6" href="#6">6</a>   <em class="jxr_comment"> * you may not use this file except in compliance with the License.</em>
<a name="7" href="#7">7</a>   <em class="jxr_comment"> * You may obtain a copy of the License at</em>
<a name="8" href="#8">8</a>   <em class="jxr_comment"> *</em>
<a name="9" href="#9">9</a>   <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a name="10" href="#10">10</a>  <em class="jxr_comment"> *</em>
<a name="11" href="#11">11</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a name="12" href="#12">12</a>  <em class="jxr_comment"> * distributed under the License is distributed on an 'AS IS' BASIS,</em>
<a name="13" href="#13">13</a>  <em class="jxr_comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a name="14" href="#14">14</a>  <em class="jxr_comment"> * See the License for the specific language governing permissions and</em>
<a name="15" href="#15">15</a>  <em class="jxr_comment"> * limitations under the License.</em>
<a name="16" href="#16">16</a>  <em class="jxr_comment"> */</em>
<a name="17" href="#17">17</a>  
<a name="18" href="#18">18</a>  <strong class="jxr_keyword">package</strong> org.graphnav.swing;
<a name="19" href="#19">19</a>  
<a name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> org.graphnav.swing.event.EditingListener;
<a name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> org.graphnav.util.GeomUtils;
<a name="22" href="#22">22</a>  
<a name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.awt.Color;
<a name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.awt.Graphics2D;
<a name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> java.awt.Point;
<a name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> java.awt.geom.Line2D;
<a name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> java.awt.geom.Point2D;
<a name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> java.awt.geom.Rectangle2D;
<a name="29" href="#29">29</a>  
<a name="30" href="#30">30</a>  <em class="jxr_javadoccomment">/**</em>
<a name="31" href="#31">31</a>  <em class="jxr_javadoccomment"> * Defines the default &lt;i&gt;Arc&lt;/i&gt; implementation.</em>
<a name="32" href="#32">32</a>  <em class="jxr_javadoccomment"> */</em>
<a name="33" href="#33">33</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../org/graphnav/swing/DefaultArc.html">DefaultArc</a> <strong class="jxr_keyword">extends</strong> <a href="../../../org/graphnav/swing/Arc.html">Arc</a> {
<a name="34" href="#34">34</a>  
<a name="35" href="#35">35</a>      <em class="jxr_javadoccomment">/**</em>
<a name="36" href="#36">36</a>  <em class="jxr_javadoccomment">     * Arrow rectangle size.</em>
<a name="37" href="#37">37</a>  <em class="jxr_javadoccomment">     */</em>
<a name="38" href="#38">38</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> DIRECTION_RECT_SQUARE = 6;
<a name="39" href="#39">39</a>  
<a name="40" href="#40">40</a>      <em class="jxr_javadoccomment">/**</em>
<a name="41" href="#41">41</a>  <em class="jxr_javadoccomment">     * Internal constant.</em>
<a name="42" href="#42">42</a>  <em class="jxr_javadoccomment">     */</em>
<a name="43" href="#43">43</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> DIRECTION_RECT_SQUARE_DIV2 = DIRECTION_RECT_SQUARE / 2;
<a name="44" href="#44">44</a>  
<a name="45" href="#45">45</a>      <em class="jxr_javadoccomment">/**</em>
<a name="46" href="#46">46</a>  <em class="jxr_javadoccomment">     * The renderable editor static instance.</em>
<a name="47" href="#47">47</a>  <em class="jxr_javadoccomment">     */</em>
<a name="48" href="#48">48</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <a href="../../../org/graphnav/swing/DefaultArcRenderableEditor.html">DefaultArcRenderableEditor</a> renderableEditor = <strong class="jxr_keyword">new</strong> <a href="../../../org/graphnav/swing/DefaultArcRenderableEditor.html">DefaultArcRenderableEditor</a>();
<a name="49" href="#49">49</a>  
<a name="50" href="#50">50</a>      <em class="jxr_javadoccomment">/**</em>
<a name="51" href="#51">51</a>  <em class="jxr_javadoccomment">     * Node description.</em>
<a name="52" href="#52">52</a>  <em class="jxr_javadoccomment">     */</em>
<a name="53" href="#53">53</a>      <strong class="jxr_keyword">private</strong> String description;
<a name="54" href="#54">54</a>  
<a name="55" href="#55">55</a>      <em class="jxr_javadoccomment">/**</em>
<a name="56" href="#56">56</a>  <em class="jxr_javadoccomment">     * Node origin.</em>
<a name="57" href="#57">57</a>  <em class="jxr_javadoccomment">     */</em>
<a name="58" href="#58">58</a>      <strong class="jxr_keyword">private</strong> <a href="../../../org/graphnav/swing/Node.html">Node</a> fromNode;
<a name="59" href="#59">59</a>  
<a name="60" href="#60">60</a>      <em class="jxr_javadoccomment">/**</em>
<a name="61" href="#61">61</a>  <em class="jxr_javadoccomment">     * Node destination.</em>
<a name="62" href="#62">62</a>  <em class="jxr_javadoccomment">     */</em>
<a name="63" href="#63">63</a>      <strong class="jxr_keyword">private</strong> <a href="../../../org/graphnav/swing/Node.html">Node</a> toNode;
<a name="64" href="#64">64</a>  
<a name="65" href="#65">65</a>      <em class="jxr_javadoccomment">/**</em>
<a name="66" href="#66">66</a>  <em class="jxr_javadoccomment">     * Arc line.</em>
<a name="67" href="#67">67</a>  <em class="jxr_javadoccomment">     */</em>
<a name="68" href="#68">68</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Line2D arcLine = <strong class="jxr_keyword">new</strong> Line2D.Double();
<a name="69" href="#69">69</a>  
<a name="70" href="#70">70</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Point2D.Double[] intersectionPoint =
<a name="71" href="#71">71</a>              <strong class="jxr_keyword">new</strong> Point2D.Double[] { <strong class="jxr_keyword">new</strong> Point2D.Double() ,  <strong class="jxr_keyword">new</strong> Point2D.Double() };
<a name="72" href="#72">72</a>  
<a name="73" href="#73">73</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <a href="../../../org/graphnav/swing/DefaultArcRenderableEditor.html">DefaultArcRenderableEditor</a> getRenderableEditor() {
<a name="74" href="#74">74</a>           <strong class="jxr_keyword">return</strong> renderableEditor;
<a name="75" href="#75">75</a>      }
<a name="76" href="#76">76</a>  
<a name="77" href="#77">77</a>      <strong class="jxr_keyword">public</strong> <a href="../../../org/graphnav/swing/DefaultArc.html">DefaultArc</a>(String description, <a href="../../../org/graphnav/swing/Node.html">Node</a> fromNode, <a href="../../../org/graphnav/swing/Node.html">Node</a> toNode) {
<a name="78" href="#78">78</a>          <strong class="jxr_keyword">this</strong>.description = description;
<a name="79" href="#79">79</a>          <strong class="jxr_keyword">this</strong>.fromNode    = fromNode;
<a name="80" href="#80">80</a>          <strong class="jxr_keyword">this</strong>.toNode      = toNode;
<a name="81" href="#81">81</a>      }
<a name="82" href="#82">82</a>  
<a name="83" href="#83">83</a>      <strong class="jxr_keyword">public</strong> <a href="../../../org/graphnav/swing/DefaultArc.html">DefaultArc</a>(<a href="../../../org/graphnav/swing/Node.html">Node</a> fromNode, <a href="../../../org/graphnav/swing/Node.html">Node</a> toNode) {
<a name="84" href="#84">84</a>           <strong class="jxr_keyword">this</strong>(<strong class="jxr_keyword">null</strong>, fromNode, toNode);
<a name="85" href="#85">85</a>      }
<a name="86" href="#86">86</a>  
<a name="87" href="#87">87</a>      <strong class="jxr_keyword">public</strong> <a href="../../../org/graphnav/swing/Node.html">Node</a> getFromNode() {
<a name="88" href="#88">88</a>          <strong class="jxr_keyword">return</strong> fromNode;
<a name="89" href="#89">89</a>      }
<a name="90" href="#90">90</a>  
<a name="91" href="#91">91</a>      <strong class="jxr_keyword">public</strong> <a href="../../../org/graphnav/swing/Node.html">Node</a> getToNode() {
<a name="92" href="#92">92</a>          <strong class="jxr_keyword">return</strong> toNode;
<a name="93" href="#93">93</a>      }
<a name="94" href="#94">94</a>  
<a name="95" href="#95">95</a>      <strong class="jxr_keyword">public</strong> String getDescription() {
<a name="96" href="#96">96</a>          <strong class="jxr_keyword">return</strong> description != <strong class="jxr_keyword">null</strong> ? description : getFromNode().getDescription() + <span class="jxr_string">" - "</span>  + getToNode().getDescription();
<a name="97" href="#97">97</a>      }
<a name="98" href="#98">98</a>  
<a name="99" href="#99">99</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> setDescription(String d) {
<a name="100" href="#100">100</a>         description = d;
<a name="101" href="#101">101</a>     }
<a name="102" href="#102">102</a> 
<a name="103" href="#103">103</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> paintShape(Graphics2D g2din, <strong class="jxr_keyword">boolean</strong> selected, <strong class="jxr_keyword">boolean</strong> overlapped, <strong class="jxr_keyword">int</strong> detailLevel) {
<a name="104" href="#104">104</a>         Graphics2D g2d = getGraphics2D(g2din);
<a name="105" href="#105">105</a>         g2d.setColor(Color.RED);
<a name="106" href="#106">106</a>         g2d.setStroke(  selected ? THICK_STROKE : THIN_STROKE );
<a name="107" href="#107">107</a>         Point c1 = center(fromNode.getBounds2D(detailLevel));
<a name="108" href="#108">108</a>         Point c2 = center(toNode.getBounds2D(detailLevel));
<a name="109" href="#109">109</a>         arcLine.setLine( c1.getX(), c1.getY(), c2.getX(), c2.getY());
<a name="110" href="#110">110</a>         g2d.draw(arcLine);
<a name="111" href="#111">111</a> 
<a name="112" href="#112">112</a>         g2d.setColor(Color.BLACK);
<a name="113" href="#113">113</a> 
<a name="114" href="#114">114</a>         <em class="jxr_comment">//Draw direction.</em>
<a name="115" href="#115">115</a>         Rectangle2D toNodeBounds = toNode.getBounds2D(detailLevel);
<a name="116" href="#116">116</a>         GeomUtils.intersectLineRectangle(
<a name="117" href="#117">117</a>                 arcLine.getX1(),
<a name="118" href="#118">118</a>                 arcLine.getY1(),
<a name="119" href="#119">119</a>                 arcLine.getX2(),
<a name="120" href="#120">120</a>                 arcLine.getY2(),
<a name="121" href="#121">121</a>                 toNodeBounds.getX(),
<a name="122" href="#122">122</a>                 toNodeBounds.getY(),
<a name="123" href="#123">123</a>                 toNodeBounds.getWidth(),
<a name="124" href="#124">124</a>                 toNodeBounds.getHeight(),
<a name="125" href="#125">125</a>                 intersectionPoint
<a name="126" href="#126">126</a>         );
<a name="127" href="#127">127</a>         g2d.setColor(Color.BLUE);
<a name="128" href="#128">128</a>         g2d.fillRect(
<a name="129" href="#129">129</a>                 (<strong class="jxr_keyword">int</strong>) intersectionPoint[0].getX() - DIRECTION_RECT_SQUARE_DIV2,
<a name="130" href="#130">130</a>                 (<strong class="jxr_keyword">int</strong>) intersectionPoint[0].getY() - DIRECTION_RECT_SQUARE_DIV2,
<a name="131" href="#131">131</a>                 DIRECTION_RECT_SQUARE,
<a name="132" href="#132">132</a>                 DIRECTION_RECT_SQUARE
<a name="133" href="#133">133</a>         );
<a name="134" href="#134">134</a> 
<a name="135" href="#135">135</a>         <em class="jxr_comment">//Draw string.</em>
<a name="136" href="#136">136</a>         <strong class="jxr_keyword">if</strong>(detailLevel == Renderable.DETAIL_LEVEL_MEDIUM) {
<a name="137" href="#137">137</a>             <strong class="jxr_keyword">int</strong> xString = (<strong class="jxr_keyword">int</strong>) ( (c2.getX() - c1.getX()) / 2 + c1.getX() );
<a name="138" href="#138">138</a>             <strong class="jxr_keyword">int</strong> yString = (<strong class="jxr_keyword">int</strong>) ( (c2.getY() - c1.getY()) / 2 + c1.getY() );
<a name="139" href="#139">139</a>             g2d.setColor(Color.BLACK);
<a name="140" href="#140">140</a>             g2d.drawString(getDescription(), xString, yString);
<a name="141" href="#141">141</a>         }
<a name="142" href="#142">142</a>     }
<a name="143" href="#143">143</a> 
<a name="144" href="#144">144</a>     <strong class="jxr_keyword">private</strong> Point center(Rectangle2D r) {
<a name="145" href="#145">145</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> Point((<strong class="jxr_keyword">int</strong>) r.getCenterX(), (<strong class="jxr_keyword">int</strong>) r.getCenterY());
<a name="146" href="#146">146</a>     }
<a name="147" href="#147">147</a> 
<a name="148" href="#148">148</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/graphnav/swing/RenderableEditor.html">RenderableEditor</a> edit(<a href="../../../org/graphnav/swing/event/EditingListener.html">EditingListener</a> el) {
<a name="149" href="#149">149</a>         <a href="../../../org/graphnav/swing/DefaultArcRenderableEditor.html">DefaultArcRenderableEditor</a> ed = getRenderableEditor();
<a name="150" href="#150">150</a>         ed.configure(<strong class="jxr_keyword">this</strong>, el);
<a name="151" href="#151">151</a>         <strong class="jxr_keyword">return</strong> ed;
<a name="152" href="#152">152</a>     }
<a name="153" href="#153">153</a> 
<a name="154" href="#154">154</a> }
</pre>
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